sqlite3: Add simple test.

sqlite3/test_sqlite3.py

@@ -0,0 +1,12 @@
+import sqlite3
+
+
+conn = sqlite3.connect(":memory:")
+
+cur = conn.cursor()
+cur.execute("SELECT 1, 'foo', 3.14159 UNION SELECT 3, 3, 3")
+while True:
+    row = cur.fetchone()
+    if row is None:
+        break
+    print(row)